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        <h1 id="SpringBoot的静态资源访问"><a href="#SpringBoot的静态资源访问" class="headerlink" title="SpringBoot的静态资源访问"></a>SpringBoot的静态资源访问</h1><h2 id="1-引入包"><a href="#1-引入包" class="headerlink" title="1. 引入包"></a>1. 引入包</h2><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.springframework.boot<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>spring-boot-starter-web<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br></pre></td></tr></table></figure>
<span id="more"></span>
<h2 id="2-静态资源部署位置"><a href="#2-静态资源部署位置" class="headerlink" title="2.静态资源部署位置"></a>2.静态资源部署位置</h2><ul>
<li>使用idea创建Springboot项目，一般会自动在resources下面生成static文件，静态资源就放里面。</li>
<li>当然也有四个优先级，详情请见<a target="_blank" rel="noopener" href="https://blog.csdn.net/u012461090/article/details/108352698#:~:text=springBoot%E9%9D%99%E6%80%81%E8%B5%84%E6%BA%90%E8%AE%BF%E9%97%AE%E4%BC%98%E5%85%88%E7%BA%A7%20%E9%BB%98%E8%AE%A4%E6%96%87%E4%BB%B6%E5%A4%B9%E5%8F%AA%E6%9C%89static%2C%20%E4%BC%98%E5%85%88%E7%BA%A7%20%E6%9C%80%E9%AB%98%E7%9A%84%E6%98%AFresources%3Estatic%3Econfig%20%E5%B0%B1%E6%98%AF%20%E8%AE%BF%E9%97%AE%20%E5%90%8C%E4%B8%AA%E6%96%87%E4%BB%B6%E6%9C%80%E5%85%88%20%E8%AE%BF%E9%97%AE,%E8%B5%84%E6%BA%90%20springboot%20%E9%87%8C%E9%9D%A2%20%E9%9D%99%E6%80%81%E8%B5%84%E6%BA%90%20%E5%8A%A0%E8%BD%BD%E9%A1%BA%E5%BA%8F%20%E4%BC%98%E5%85%88%E7%BA%A7%20weixin_42792618%E7%9A%84%E5%8D%9A%E5%AE%A2%202976">相关blog</a></li>
</ul>
<h2 id="3-使用浏览器访问"><a href="#3-使用浏览器访问" class="headerlink" title="3. 使用浏览器访问"></a>3. 使用浏览器访问</h2><p>直接<a target="_blank" rel="noopener" href="http://localhost:8333/foward1.jpg">http://localhost:8333/foward1.jpg</a> 就可以访问到静态资源foward1.jpg</p>
<h2 id="4-SpringBoot的默认访问策略"><a href="#4-SpringBoot的默认访问策略" class="headerlink" title="4. SpringBoot的默认访问策略"></a>4. SpringBoot的默认访问策略</h2><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="keyword">static</span> <span class="class"><span class="keyword">class</span> <span class="title">WebMvcAutoConfigurationAdapter</span> <span class="keyword">implements</span> <span class="title">WebMvcConfigurer</span>, <span class="title">ResourceLoaderAware</span></span></span><br></pre></td></tr></table></figure>
<p>在WebMvcAutoConfiguration类内部有一个静态内部类WebMvcAutoConfigurationAdapter，实现了WebMvcConfigurer接口。<br>而WebMvcConfigurer接口中有一个 addResourceHandlers方法就是用来处理静态资源过滤的。<br>具体实现的代码如下：<br><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">addResourceHandlers</span><span class="params">(ResourceHandlerRegistry registry)</span> </span>&#123;</span><br><span class="line">            <span class="keyword">if</span> (!<span class="keyword">this</span>.resourceProperties.isAddMappings()) &#123;</span><br><span class="line">                logger.debug(<span class="string">&quot;Default resource handling disabled&quot;</span>);</span><br><span class="line">            &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">                Duration cachePeriod = <span class="keyword">this</span>.resourceProperties.getCache().getPeriod();</span><br><span class="line">                CacheControl cacheControl = <span class="keyword">this</span>.resourceProperties.getCache().getCachecontrol().toHttpCacheControl();</span><br><span class="line">                <span class="keyword">if</span> (!registry.hasMappingForPattern(<span class="string">&quot;/webjars/**&quot;</span>)) &#123;</span><br><span class="line">                    <span class="keyword">this</span>.customizeResourceHandlerRegistration(registry.addResourceHandler(<span class="keyword">new</span> String[]&#123;<span class="string">&quot;/webjars/**&quot;</span>&#125;).addResourceLocations(<span class="keyword">new</span> String[]&#123;<span class="string">&quot;classpath:/META-INF/resources/webjars/&quot;</span>&#125;).setCachePeriod(<span class="keyword">this</span>.getSeconds(cachePeriod)).setCacheControl(cacheControl));</span><br><span class="line">                &#125;</span><br><span class="line"></span><br><span class="line">                String staticPathPattern = <span class="keyword">this</span>.mvcProperties.getStaticPathPattern();</span><br><span class="line">                <span class="keyword">if</span> (!registry.hasMappingForPattern(staticPathPattern)) &#123;</span><br><span class="line">                    <span class="keyword">this</span>.customizeResourceHandlerRegistration(registry.addResourceHandler(<span class="keyword">new</span> String[]&#123;staticPathPattern&#125;).addResourceLocations(getResourceLocations(<span class="keyword">this</span>.resourceProperties.getStaticLocations())).setCachePeriod(<span class="keyword">this</span>.getSeconds(cachePeriod)).setCacheControl(cacheControl));</span><br><span class="line">                &#125;</span><br><span class="line"></span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br></pre></td></tr></table></figure><br>其中staticPathPattern默认定义在mvcProperties中，具体内容如下：<br><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">this</span>.staticPathPattern = <span class="string">&quot;/**&quot;</span>;</span><br></pre></td></tr></table></figure><br>this.resourceProperties.getStaticLocations();获取到默认静态资源位置定义在ResourceProperties中，代码如下<br><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> String[] CLASSPATH_RESOURCE_LOCATIONS = <span class="keyword">new</span> String[]&#123;<span class="string">&quot;classpath:/META-INF/resources/&quot;</span>, <span class="string">&quot;classpath:/resources/&quot;</span>, <span class="string">&quot;classpath:/static/&quot;</span>, <span class="string">&quot;classpath:/public/&quot;</span>&#125;;</span><br></pre></td></tr></table></figure></p>
<h2 id="5-结论"><a href="#5-结论" class="headerlink" title="5. 结论"></a>5. 结论</h2><p>Springboot默认过滤掉所有的静态资源，静态资源的位置一共有五个，开发者放在任意一个位置都可以。但是建议放在static下面。</p>

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